The 53-year-old singer and photographer opened his 'Exposed' exhibition, which features photographic portraits of various celebrities including the late Amy Winehouse, Victoria Beckham and Mickey Rourke, at Ostlicht gallery in the Austrian capital.

The black-and-white shot of singer Pink shows her standing side on with one hand to her mouth holding a cigarette and the other on her hip. The 33-year-old star wears a bolt through her nipple, dog tags around her neck and a pair of jeans with a studded belt.

Speaking about the image to Billboard, Adams explained: "It was a nice day. It was kind of hot outside. I suggested it might be a good idea; she said to me, 'Not even my husband talks to me like that', and then off came her T-shirt."

See other nude portraits of celebrities - including Sienna Miller and Tom Jones - below.